Citi has just introduced a brand new promotion for its Citi Platinum Select Mastercard, offering an 0% intro APR for 21 months on balance transfers and 0% intro APR for 12 months on purchases. Both the rate and length of your introductory offer will be based on your creditworthiness. If you’re looking to take advantage of the balance transfer offer, there is a 3% uncapped balance transfer fee with a $5 min. The card has no annual fee.

To view more info or to apply, see this link.

Update 3/2011: Please note that the previous Citi Platinum Select promo has ended. Please click here to see the current promo.